$0.05/$0.10

Hero (SB): $10.58 (105.8 bb)
BB: $22.98 (229.8 bb)
UTG: $13.14 (131.4 bb)
MP: $15.19 (151.9 bb)
CO: $12.79 (127.9 bb)
BTN: $12.03 (120.3 bb)

Preflop: Hero is SB with Kh 9h
3 folds, BTN raises to $0.30, Hero raises to $1, BB folds, BTN calls $0.70

Flop: ($2.10) 4c Th Ah (2 players)
Hero bets $1.15, BTN calls $1.15

Turn: ($4.40) 2c (2 players)
Hero bets $2.55, BTN raises to $6, Hero ?

He doesn't put me all-in here so I was very confused. If I call i have like $2.30 behind. I don't know if I should call here, knowing that we're always beat, or just fold getting almost the right price, but saving half a stack or just shove.